body {
  margin: 0;
  padding: 0;
  font-family: 'Roboto', sans-serif;
  background-color: #f5f5f5;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.game-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 10px;
  width: 450px;
  height: 450px;
  background-color: #bbada0;
  padding: 10px;
  border-radius: 5px;
  box-shadow: 0px 0px 15px 5px rgba(0, 0, 0, 0.2);
  position: relative;
}

.cell {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  font-weight: bold;
  background-color: #cdc1b4;
  border-radius: 5px;
  color: #776e65;
}

.cell.zero {
  background-color: transparent;
}

.selected {
  background-color: #eee4da;
}

.game-over {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 48px;
  font-weight: bold;
  color: #776e65;
  background-color: rgba(238, 228, 218, 0.8);
  border-radius: 5px;
  padding: 20px;
  text-align: center;
}

.hide {
  display: none;
}

.score {
  margin-top: 20px;
  font-size: 36px;
  font-weight: bold;
  color: #776e65;
}

.reset {
  margin-top: 20px;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 24px;
  font-weight: bold;
  color: #776e65;
  background-color: #8f7a66;
  border: none;
  cursor: pointer;
}

.reset:hover {
  background-color: #9c8871;
}